Alias /admin /var/www/html/site
Alias /site /var/www/html/site

<VirtualHost *:80>
        DocumentRoot /var/www/html
        RedirectMatch ^/$ /site/
        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        Include conf-available/webdav.conf
        Include conf-available/readonly.conf
</VirtualHost>
